三年级英语下册 is not free (it costs 3300.00), however it doesn't contain in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
The price of 三年级英语下册 is 3300.00.
To get estimated revenue of 三年级英语下册 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.